Add user data dir field to Mac platform apps

chrome/common/mac/app_mode_common.h

Index: chrome/common/mac/app_mode_common.h
diff --git a/chrome/common/mac/app_mode_common.h b/chrome/common/mac/app_mode_common.h
index 09870e1fdbb5e6dcaea0f807a19d1f6877fdfb90..22c631b25e3c3b7e9091d9c401cd493f83424d50 100644
--- a/chrome/common/mac/app_mode_common.h
+++ b/chrome/common/mac/app_mode_common.h
@@ -29,6 +29,9 @@ extern NSString* const kCrAppModeShortcutNameKey;
 // Key for the app's URL.
 extern NSString* const kCrAppModeShortcutURLKey;
 
+// Key for the app user data directory.
+extern NSString* const kCrAppModeUserDataDirKey;
+
 // When the Chrome browser is run, it stores it's location in the defaults
 // system using this key.
 extern NSString* const kLastRunAppBundlePathPrefsKey;
@@ -83,6 +86,9 @@ struct ChromeAppModeInfo {
 
   // URL for the shortcut. Must be a valid URL.
   std::string app_mode_url;  // Optional: v1.0
+
+  // Path to the app's user data directory.
+  FilePath user_data_dir;
 };
 
 }  // namespace app_mode